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FRANCIS ZELL, OIF LOUISVILLE, KENTUCKY.

Letters Patent 1%. 79,047, dated June 16, 1868.

IMPROVEMENT IN SHUTTER-IASTENING.

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TO ALL IVI-IOM IT MAY CONCERN;

Be it known that I, FRANCIS ZELL, of Louisville, in the county of Jefferson, and State of Kentucky, have invented a new and useful Shutter-Fastening; and I do hereby declare the following to bea full, clear, and exact description of the same, sufficient to enable others skilled in the art to which my invention appertains to fully understand and use the same, reference being had to the accompanying drawings, which are made part of thisspecication, and in which I Figure 1 is a sectional view of a fragment of a windowfshutter.and frame, with my invention applied.

Figure 2 is a view of a portion of the inner side of the shutter.

Figures 3, 4, 5, 6, and 7 are detached views of the several parts pertaining to the fastcning-derice.

Similar letters of reference indicate corresponding parts in the several gures.` i

This invention is more particularly designed to supersede the thumb-screws which are almost universally employed to fasten the shuttersl of store-windows, and which are objectionable on account of the many turns which are required in order to screw them up to the fastening-point, and the consequent consumption of time in performing the operation. The thumb-screws are also objectionable on account of their liability to get out of their sockets and be lost. l

My device requires but a partial rotation, a single turn by the thumb and finger suiicing to secure the shutter, and the fastening-device is permanently retained in the frame, so as to be always ready for service.

In the drawing, tig. l, A may represent a fragment, the lower part of a window-frame, and B a fragment of the shutter. The fastening-device, which securesV the shutter B to the frame A, is shown detached in tig. 5, It is designed to be cast of a single piece, and consists of successive cylindrical portions, C C1 C2, to which is joined the attened thumb-piece C3, by which the device is turned upon its axis, after the manner of the ordinary thumb-screw. Unlike the thumb-screw, it is devoid of threads, and depends, as a fastening, upon its shouldered head Gywhich, permanently projecting outside of the window-frame, enters the recess 6 when the shutter is put up, and requires but a partial 'turn to then engage with the shoulders or ledges at l1 b', and secure the shutter. i

The socket or aperture to accommodate the enlarged portion C is first bored in the window-frame A, and the two slotted and matched plates DD (see gs. 6 and 7) are then applied to the shank C from opposite direc-m tions, and screwed to the frame A, so as to prevent the displacement of the fastening-device by an outward or Y an inward movement. Hence the fastening-device is not liable to be casually drawn or pushed out.

The plates'D D may be provided with corresponding straight-sided slots, and may present perfectly flat and unbroken plane surfaces on both sides; but I prefer to construct each plate as shown in the drawings, that is to say, with the-sides of the slot diverging toward the centre of the plate, and 'with a corresponding projec tion or raised portion, d. When the plates are put together, the projection of one plate occupiesso much of the slot of the other plate as does not assist in forming 'the hole which accommodates the shank C ofthe fasteningL device, as shown in iig. 4.

The provision of the tapering projections ci not only cna-bles a neatcr and more solid finish, by filling the space which would be otherwise left in each plate, but prevents said plates from moving in any direction upon each other. Thus the projections CZ serve as an important adjunct of the screws at 7L, and, in fact, are much more effective than the latter in'conpling and locking the `plates D together. This construction of the plates D is the-more to be desired on account of the tendency to their derangement which would otherwise be exerted by the stop-pin c, which, projecting from the fastening-device, has its play limited between the shoulders d ci on the respective plates D D, and which serves to determine and indicate the entent of rotation which is necessary to engage'the fastening-device with the shutter.

The plates D D, constructed as above described, will be found a very desirable means of retaining in place the ordinary shutter-fastening thumb-screws, and I propose to employ them for this purpose. i

The head, C, may be of any form other than that represented, it being only essential `that it have Shoals ders to engagewith corresponding shoulders or ledges'in the shutter.

I propose to employ this fastening for any. purpose to which it may 'De applicable as a fasteningdevic. Having thus described my invention, what I claim as new he1eii1,nnddesirc to secure by Letters Patent, is 1. The fastening-device, consistingof the successive cylindrical portions C C C2, the thumb-piece C3, and

-shouldered head 0*, in combination with two -matched retaining-plates, substantially as and for the purpose set forth.

2. The plates DD, constructed with slots lhaving diverging sides7 and with corresponding projections d d, substantially as and for the prpose set forth. A

To the above specification of my improved shutter-fastening, I have signed my name, this thirtieth day of Aprn, 1868.

FRANCIS ZELL.

Witnesses:

JOHN A. WIEDERSHEIM, JACOB F. HENRY. 

